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CSA B51-97

Boiler, Pressure Vessel and Pressure Piping Code – Includes General Instruction No. 2 (FEB-1998)
standard by CSA Group, 09/01/1997

CSA C22.2 NO. 4-16

Enclosed and dead-front switches (Tri-National standard, with NMX-J-162-ANCE-2016 and UL 98), Includes Update No. 1 (2019)
standard by CSA Group, 02/12/2016